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Problems are based on the following query: SELECT                                  P_CODE, SUM(LINE_UNITS) FROM                                    LINE GROUP BY                           P_CODE HAVING                               SUM(LINE_UNITS) > (SELECT MAX(LINE_UNITS) FROM LINE); Should you create an index on P_CODE? If so, write the SQL command to create the index. If not, explain your reasoning.

Problems are based on the following query: SELECT                                  P_CODE, SUM(LINE_UNITS) FROM                                    LINE GROUP BY                           P_CODE HAVING                               SUM(LINE_UNITS) > (SELECT MAX(LINE_UNITS) FROM LINE); Should you create an index on P_CODE? If so, write the SQL command to create the index. If not, explain your reasoning.

Database Systems: Design, Implementation, & Management
Database Systems: Design, Implementation, & Management
11th Edition
ISBN:9781285196145
Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Chapter11: Database Performance Tuning And Query Optimization
Section: Chapter Questions
Problem 26P: Problems 25 and 26 are based on the following query: SELECT P_CODE, P_DESCRIPT, P_QOH, P_PRICE,...
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Problems are based on the following query:

SELECT                                  P_CODE, SUM(LINE_UNITS)

FROM                                    LINE

GROUP BY                           P_CODE

HAVING                               SUM(LINE_UNITS) > (SELECT MAX(LINE_UNITS) FROM LINE);

Should you create an index on P_CODE? If so, write the SQL command to create the index. If not, explain your reasoning.

 

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